Fluke 78 - Page 6

78
Service Manual
ii
3-1. Introduction ........................................................................................... 3-3
3-2. Recommended Equipment .................................................................... 3-3
3-3. Operator Maintenance ........................................................................... 3-3
3-4. Case Disassembly ............................................................................. 3-3
3-5. Battery Replacement ......................................................................... 3-3
3-6. Fuse Test ........................................................................................... 3-5
3-7. Fuse Replacement ............................................................................. 3-5
3-8. Circuit Assembly Removal ............................................................... 3-5
3-9. Display Access .................................................................................. 3-5
3-10. Cleaning ................................................................................................. 3-7
3-11. Performance Tests ................................................................................. 3-7
3-12. Setup .................................................................................................. 3-7
3-13. Display Test ...................................................................................... 3-8
3-14. DC Voltage Test ................................................................................ 3-8
3-15. AC Voltage Test ................................................................................ 3-9
3-16. Frequency Test .................................................................................. 3-9
3-17. Frequency, Dwell, and Duty Cycle Trigger Level Test .................... 3-10
3-18. RPM Test .......................................................................................... 3-10
3-19. Ohms Test ......................................................................................... 3-11
3-20. Continuity Test .................................................................................. 3-11
3-21. Diode Test ......................................................................................... 3-12
3-22. DC and AC Current Test ................................................................... 3-12
3-23. Temperature Test .............................................................................. 3-12
3-24. RPM80 Inductive Pickup Test (Optional Accessory) ....................... 3-14
3-25. Calibration ............................................................................................. 3-17
3-26. Troubleshooting .................................................................................... 3-18
3-27. Surface Mount Assemblies ............................................................... 3-18
3-28. Power Supply Related Troubleshooting ........................................... 3-18
3-29. Common (Shunt) Regulator Troubleshooting .................................. 3-19
3-30. Vdd (Series) Regulator Troubleshooting .......................................... 3-20
4 List of Replaceable Parts .................................................................... 4-1
4-1. Introduction ........................................................................................... 4-3
4-2. How to Obtain Parts .............................................................................. 4-3
4-3. Manual Status Information .................................................................... 4-3
4-4. Service Centers ...................................................................................... 4-4
4-5. Parts Lists .............................................................................................. 4-4
5 Schematic Diagrams............................................................................ 5-1